проверить дескриптор файла (ПОТОКИ) (test a file descriptor (STREAMS))
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
isastream — test a file descriptor (STREAMS)
Синопсис (Synopsis)
#include <stropts.h>
int isastream(int fildes);
Описание (Description)
The isastream() function shall test whether fildes, an open file
descriptor, is associated with a STREAMS-based file.
Возвращаемое значение (Return value)
Upon successful completion, isastream() shall return 1 if fildes
refers to a STREAMS-based file and 0 if not. Otherwise,
isastream() shall return -1 and set errno to indicate the error.
Ошибки (Error)
The isastream() function shall fail if:
EBADF The fildes argument is not a valid open file descriptor.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
The isastream() function may be removed in a future version.
Смотри также (See also)
The Base Definitions volume of POSIX.1‐2017, stropts.h(0p)
